Step stool



FIG. 1 is top front right perspective view showing a step stool of theinvention.

FIG. 2 is bottom rear right perspective view showing the step stool ofFIG. 1.

FIG. 3 is a front view showing the step stool of FIG. 1.

FIG. 4 is a rear view showing the step stool of FIG. 1.

FIG. 5 is a top view showing the step stool of FIG. 1.

FIG. 6 is a right side view showing the step stool of FIG. 1.

FIG. 7 is left side view showing the step stool of FIG. 1; and,

FIG. 8 is bottom showing the step stool of FIG. 1.

The broken lines in the drawings depict portions of the step stool thatform no part of the claimed design.

CLAIM The ornamental design for a step stool, as shown and described.